Format ASTC

Answered

Jason Stanczyk

• April 26, 2024 14:00

When all images are changed from PNG to using ASTC format, the exported KZB size is increased. What is the reasoning for this?

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  Jason Stanczyk

  • April 26, 2024 14:03

  ASTC compression targets faster decoding by the GPU rather than reducing the file size on disk so the increase in the KZB size is expected and normal. You can try different block sizes to optimize kzb file size and texture quality.

  If you could download the ASTC tool provided by ARM and run it on the DefaultBackground.png, you will notice that output is actually larger in size:
  

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